JPH05211967A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To prevent an electrode part of a connecting part of each auxiliary item from short-circuiting in a vacuum cleaner wherein a hose, an extension tube and a suction hole body are connected with the main body of the vacuum cleaner and a rotating brush is rotated by means of a motor for the rotating brush provided in the suction hole body. CONSTITUTION:A reed switch 34 is provided at a connecting part on the hose side and a magnet 35 is provided on the opposite side in such a way that the connecting part of the point of the switch 29 at hand is not electrically energized even if the switch 29 at hand provided at an operational part 22 at hand of a hose is made 'ON' when a suction hole body or the suction hole body and an extension tube 24 are not connected, and an electrically insulating device is provided in such a way that the lead switch becomes 'ON' only when the reed switch 34 and the magnet 35 are made close each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner, and more particularly to an electric vacuum cleaner in which a hose, an extension tube and a suction port are connected to an electric vacuum cleaner body to electrically connect respective parts.

[0002]

2. Description of the Related Art Conventionally, in this type, an electric vacuum cleaner body 1 shown in FIG. 7 is connected with a hose 3 having a hand-operated portion 2, and an extension pipe 4-- is connected with the hose 3. 4, the suction port body 5 is connected, and for example, the hand switch 6 provided on the hand operation unit 2 is turned on and off to drive the rotary brush electric motor 7 incorporated in the suction port body 5 to rotate the rotary brush 8. It is known to rotate.

The electrical connection of the above construction is formed as shown in FIG. 11, 9 is an electric blower built in the main body 1 of the vacuum cleaner, and 10 is a main switch provided in the main body 1.

Further, as shown in FIGS. 8 and 9, electrode plates 11, 11 for electrically connecting to the extension tube 4 are provided at the tip of the hand-side operation portion 2 of the hose 3, and lead wires 12,
It is connected to an electrode portion (not shown) of the cleaner body 1 by 12. 6 is the above-mentioned hand switch, and the lead wire 1
It is provided in the middle of either of 2 and 12.

On the other hand, as shown in FIG. 10, the extension tube 4 has connection pins 13 and 1 connected to the electrode plates 11 and 11 on the connection side.
3 is projectingly provided, and electrode plates 11 and 11 are provided on the connected portion.

Further, connection pins 13, 13 are provided on the connection pipe 14 of the suction port body 5 with the extension pipe 4 so as to project therefrom.

In the above structure, the hose 3 is provided with the extension pipes 4,
When the suction port body 5 is connected to the extension tube 4, the electrode plates 11 and 1 and the connection pins 13 and 13 are brought into contact with each other to be electrically connected.

[0008]

In the above structure, when the suction port body 5 or the extension tube 4 is removed, the electrode plates 11 and 11 at the tip end are energized when the hand switch 6 is turned on, and the electrode plates are erroneously set. If water is sucked in or a hairpin or the like is intentionally inserted, the electrode plates 11 and 11 are short-circuited and the fuse is blown, which is dangerous.

[0009]

In order to solve the above problems, the present invention relates to an electric vacuum cleaner in which a hose, an extension tube, and a suction port body are connected to an electric vacuum cleaner body to electrically connect the respective parts, When the suction port body or the suction port body and the extension pipe are not connected, even if a switch provided in the hand operation part of the hose is turned on, a connecting portion on the other side of the switch is provided with an electricity shielding means for not energizing. ..

It is to be noted that the electricity shielding means is composed of a magnet and a reed switch which is turned on by the proximity of the magnet.

Further, in the magnet and the reed switch, a reed switch is provided at the tip of the hose, a magnet is provided at one end of the extension tube, a reed switch is provided at the other end, and a magnet is provided at the connection pipe of the suction port body.

[0012]

When the hand switch is turned on, the electrode plate at the tip of the hose or extension tube is always in the non-energized state when the suction port body is removed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an external view showing a cleaning state of an electric vacuum cleaner, in which a hose 23 having a hand operation part 22 at its tip is connected to an electric vacuum cleaner body 21, and extension pipes 24, 24 are connected to the hose 23. Suction port 25 in the extension pipe 24
It will be connected.

A hand operation unit 2 provided on the hose 23
2, a hand switch 29 for driving a rotary brush electric motor 28 for rotating the rotary brush 26 built in the suction port body 25 is provided in the suction port body 25, and a tip end of the extension switch 24 is projected to the extension switch 24. Holes 31, 31 into which the installed electrode pins 30, 30 are inserted are provided, and electrode plates 32, 32 are provided in the holes 31, 31.

One of the electrode plates 31 has a lead wire 36.
Is connected to a connection pin (not shown) at the other end of the hose 23, and the other electrode plate 31 is the electrode plate 31 and the reed switch 3
4, the hand switch 29 is connected, and the other end of the hand switch 29 is connected to the other connecting pin (not shown) at the other end of the hose 23 by the lead wire 36.

The reed switch 34 is provided on the distal end portion 22a of the hand-operated portion.

On the other hand, as shown in FIG. 4, the extension tube 4 has a connecting portion 24a at one end, and the electrode plate 3 is provided on the connecting portion 24a side.
A magnet 35 is provided at a position facing the reed switch 34 on the surface of the hose 23 where the electrode pins 30 and 30 connected to the Nos.

The extension pipe 24 is formed of a pipe portion 24c into which dust is sucked and a cover 24d which is provided outside the pipe portion 24c and covers the above-mentioned electrical components. At the other end of the extension pipe 24, as shown in FIG.
Electrode plates 32, 32 are provided, one of the electrode plates 32 is connected to one of the electrode pins 30 by a lead wire 36, and the other electrode plate 32 is connected to the electrode plate 32 and the other electrode pin 30. Are connected by a lead wire 36 with a reed switch 34 interposed therebetween.

The electrode plate 34 and the reed switch 3
4 is the same as the configuration provided in the hand-side operation portion 22 of the hose 23 described above. The cover 24d is attached to the pipe 24c with a screw (not shown) or the like. Further, two extension pipes 24 having the above-described structure are generally connected, and if the two extension pipes 24 have exactly the same configuration, the order of connection has no order, which is convenient.

Furthermore, as shown in FIG.
A rotary brush 26 and a rotary brush electric motor 28 for rotating the rotary brush 26 are built in, and electrode pins 30, 30 for connecting to the extension pipe 24 as an electrical component for driving the electric motor 28 are provided on the connection pipe 25a in a protruding manner. Has been done. The electrode pins 30 and 30 are connected to both terminals (not shown) of the electric motor 28 through a substrate on which a rectifier, a condenser and the like (not shown) are wired.

Further, at the tip of the connecting pipe 25a,
A magnet 35 is provided at a position of the extension tube 24 facing the reed switch 34.

The electric vacuum cleaner of the present invention has the above-mentioned structure, and its operation will be described.

The main body 21 of the electric vacuum cleaner is connected to a commercial power source of 100 V, and the main body switch 37 provided on the main body 21 is turned on.
When the hand switch 29 is turned on, the electric blower 38 incorporated in the electric vacuum cleaner body 21 and the rotary brush electric motor 28 incorporated in the suction port body 25 are rotated, and dust is generated by the rotation of the rotary brush 26 and the like. Inhaled and cleaned.

At this time, the hose 23, the extension pipe 24, and the suction port body 25 are connected in the same manner as in the conventional case, but the electric circuit is constructed as shown in FIG. 6, and the respective connecting portions, that is, the hose 23 and the extension pipe. 24 (A part), extension pipe 24 and extension pipe 2
4 (B part), the extension tube 24 and the suction port body 25 (C part),
A reed switch 34 and a magnet 35 are provided, and the reed switch 34 is turned on when the magnet 35 approaches the reed switch 34, the electric circuit is made conductive, and the rotary brush electric motor 28 is energized.

Now, when the suction port body 25 is removed from the extension pipe 24, the reed switch 3416 and the magnet 35 are separated from each other, so that the reed switch 34 is turned off and the extension pipe 24
Both ends of the electrode plates 32 of 32 are non-conductive parts, and the electrode plate 3
Hand switch 2 even if both ends of 2, 32 are shorted with a conductor
No current flows though 9 is ON.

Further, even if the extension pipe 24 with the suction port body 25 still connected is removed from the other extension pipe 24 or the hose 23, the reed switch 34 at the detaching portion is turned off similarly to the above, and both ends of the electrode plates 32, 32 are turned off. Is a non-conductive part, and even if both electrode plates 32, 32 are short-circuited with a conductor, the hand switch 29
The current does not flow despite the fact that it is ON.

Although the electrode plate 32 is provided on the reed switch 34 side in the above structure, the reed switch 3
The positional relationship between the magnet 4 and the magnet 35 is as described in the above embodiment, and the object of the present invention can be achieved even if the electrode plate 32 and the electrode pin 30 are replaced. The number of extension pipes 24 is not limited.

[0028]

The present invention has the following effects due to the above-mentioned configuration. According to the present invention, at each connecting portion of the hose, the extension tube, and the suction port body, the connecting portion on the cleaner body side is brought into a conducting state by being connected, and when the connection is released, there is provided an electricity shielding means. ,
The connecting portion at the tip is a non-conductive portion even when the main switch and the hand switch of the cleaner body are in the ON state. Therefore, even if both the connecting portions are short-circuited with a conductor, they are not in a conductive state, which is very safe.

Further, a magnet is used as the electric shielding means,
Since the reed switch that is brought into a conductive state when the magnet is in proximity is provided, each connecting portion can be formed in substantially the same size as the conventional one, and the appearance is not unpleasant.

Further, since the reed switch is provided on the cleaner body side of each connecting portion, the object of the present invention can be achieved even if the positional relationship between the electrode plate and the electrode pin is reversed.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an electric vacuum cleaner of the present invention.

FIG. 2 is an external view of relevant parts for explaining a connection state between a hose tip and an extension pipe.

FIG. 3 is an internal structure diagram of a hose tip and an extension tube tip.

FIG. 4 is likewise an internal structure diagram of the entire extension tube.

FIG. 5 is an internal structure diagram of a connecting portion between the tip pipe portion and the extension pipe of the suction port body.

FIG. 6 is a similar electric circuit diagram.

FIG. 7 is an overall configuration diagram of a conventional electric vacuum cleaner.

FIG. 8 is an external view of an essential part for explaining a connection state between a conventional hose tip portion and an extension pipe.

FIG. 9 is an internal structure diagram of a hose tip and an extension tube tip.

FIG. 10 is a diagram showing the internal structure of the extension complete body.

FIG. 11 is a similar electric circuit diagram.

[Explanation of symbols]

 22 Hand Control Unit 23 Hose 24 Extension Tube 25 Suction Port 29 Hand Switch 30 Electrode Pin 32 Electrode Plate 34 Reed Switch 35 Magnet

Claims (3)

[Claims] 1. A vacuum cleaner in which a hose, an extension tube, and a suction port body are connected to a vacuum cleaner body to electrically connect the respective parts to each other, wherein the suction port body or the suction port body and the extension pipe are not connected. ,
An electric vacuum cleaner, characterized in that, even when a switch provided on the hand operation portion of the hose is turned on, an electric shielding means is provided so that a connection portion at the end of the switch is not energized. 2. The electric vacuum cleaner according to claim 1, wherein the electricity shielding unit is composed of a magnet and a reed switch that is turned on when the magnet approaches. 3. A reed switch is provided at the tip of the hose,
The vacuum cleaner according to claim 2, wherein a magnet is provided at one end of the extension tube, a reed switch is provided at the other end, and a magnet is provided at a connection pipe of the suction port body with the extension tube.